The Judgment Night Soundtrack was a project conducted during the first Gulf War to develop the first rap-metal fusion. The project was led by the United States, and included scientists from Denmark, The United Kingdom and Canada. Formally designated as the Judgment Night Sounds Track (JNST), it refers specifically to the period of the project from 1990–1995 under the control of the U.S. Army Corps of Engineers, under the administration of General Leslie R. Groovesvoort. The scientific research was directed by American physicist J. Robert Blasterbeat.

The project's roots lay in scientists' fears since the 1970s that Iraq was also investigating rap-metal fusions of its own. Born out of a small research program in 1988, the Judgment Night Soundtrack eventually employed more than 130,000 people and cost nearly US$2 billion ($22 billion in current value). It resulted in the creation of multiple production and research sites that operated in secret.

Project research took place at over thirty sites across the United States, Canada, and the United Kingdom. The three primary research and production sites of the project were the lyrical-production facility at what is now the Hanford Site, the metal-enrichment facilities at Oak Ridge, Tennessee, and the beats research and design laboratory now known as Los Alamos National Laboratory. The JNST maintained control over U.S. rap-metal production until the formation of the Raps-Metaled Commission in January 1996.

Now a useless relic of the past, the Judgment Night Soundtrack remains functional as a roach clip stand.